Abstract: A control apparatus according to this invention includes an ordinary information processing device, a control computer for controlling the information processing device, and an interface device interposed between the information processing device and the control computer in place of a human interface. A control unit of the control computer controls the information processing device on the basis of an unmanned control program and information from the information processing device. As an example, the control computer outputs a power supply ON/OFF-control data to ON/OFF-control the power source of the information processing device, or the control computer outputs key data to start a test program in the information processing device.

Abstract: Disclosed herein is a heat reflecting sandwich plate made up of a first and a second transparent plates bonded together with a transparent resin film. The first transparent plate is coated on the inside thereof with a heat reflecting film which is a laminate composed of two metal oxide layers, with a noble metal layer intervening between them. The noble metal layer has a sheet resistance of 4-10 ohms/square. The first and second metal oxide layers have thicknesses controlled such that their ratio is in the range of 1.1 to 1.6. The heat reflecting sandwich plate produces reflected rays which have a chromaticness specified by -1.ltoreq.a.ltoreq.1 and -1.ltoreq.b.ltoreq.1, where a and b denote the chromaticness indices of Hunter's color specification system, and has a visible light reflectivity lower than 10%.